CA2665484A1 - Impact filter with grease trap - Google Patents

Impact filter with grease trap Download PDF

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Publication number
CA2665484A1
CA2665484A1 CA002665484A CA2665484A CA2665484A1 CA 2665484 A1 CA2665484 A1 CA 2665484A1 CA 002665484 A CA002665484 A CA 002665484A CA 2665484 A CA2665484 A CA 2665484A CA 2665484 A1 CA2665484 A1 CA 2665484A1
Authority
CA
Canada
Prior art keywords
impact
trough
filter
nozzle
particles
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002665484A
Other languages
French (fr)
Other versions
CA2665484C (en
Inventor
Kui-Chiu Kwok
Russell Robison
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Illinois Tool Works Inc
Original Assignee
Illinois Tool Works Inc.
Kui-Chiu Kwok
Russell Robison
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Illinois Tool Works Inc., Kui-Chiu Kwok, Russell Robison filed Critical Illinois Tool Works Inc.
Publication of CA2665484A1 publication Critical patent/CA2665484A1/en
Application granted granted Critical
Publication of CA2665484C publication Critical patent/CA2665484C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
    • B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/20—Removing cooking fumes
    • F24C15/2035—Arrangement or mounting of filters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/30—Exhaust treatment
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/36—Kitchen hoods

Abstract

An impact filter suitable for a kitchen exhaust hood is provided with a grease trap to capture grease particles and channel the particles away. The trap can be of different configurations. The filter can be used in various system layouts.

Claims (25)

1. An air cleaning system comprising:
a duct;
an air mover associated with said duct for moving air through said duct; and an impact filter in air flow communication with said duct, said impact filter including:
an entrance panel defining a nozzle;
an outlet panel overlying said entrance panel and defining an outlet;
said panels associated one with the other and defining an indirect airflow path from said nozzle to said outlet;
an impact surface confronting said nozzle in spaced relation;
a baffle associated with said impact surface for guiding air away from said impact surface; and a contaminant trough associated with said impact surface and said baffle, said contaminant trough being substantially enclosed, and having a contaminant entrance defined by a space between said impact surface and said baffle.
2. The air cleaning system of claim 1, said contaminant trough including a collector wall contiguous with and angularly oriented to said impact surface, a trough bottom contiguous with said collector wall, and said baffle being contiguous with said bottom and extending from said bottom to near but spaced from said impact surface.
3. The air cleaning system of claim 2, said baffle and said collector wall being substantially parallel.
4. The air cleaning system of claim 1, including a wash system having a wash nozzle directed toward said impact filter.
5. The air cleaning system of claim 1, said trough being angularly oriented, with a first end of said trough being higher than a second end of said trough and having a drain opening at the lower end.
6. The air cleaning system of claim 1, including a second impact filter disposed in series air flow communication with said first mentioned impact filter.
7. The air cleaning system of claim 1, including at least one of an ultraviolet light source and an electrostatic precipitator in flow communication with and downstream of said impact filter.
8. A kitchen exhaust system comprising:
an exhaust hood;
an impact filter in flow communication with said hood;
at least one wash nozzle disposed in said hood; and a secondary air cleaning device in flow communication with said hood downstream from said impact filter, said secondary air cleaning device including at least one of a second impact filter, a UV light and an electrostatic precipitator.
9. The kitchen exhaust system of claim 8, said impact filter being angularly oriented and having a drain opening for draining collected contaminants therefrom.
10. An impact filter for removing contaminants entrained in an air stream, said filter comprising:
an entrance nozzle;
an impact plate confronting said nozzle in spaced relation;
a baffle associated with said impact plate for guiding air flow away from said impact plate, said baffle and said impact plate defining a space therebetween; and a trough disposed outwardly of said baffle relative to said nozzle, said trough having a trough bottom a greater distance from said impact plate than said space between said impact plate and said baffle.
11. The impact filter of claim 10, said baffle being a wall of said trough.
12. The impact filter of claim 11, including a lip on an edge of said baffle adjacent said space, said lip angling into said trough.
13. The impact filter of claim 10, said trough bottom being one of flat, rounded and pointed.
14. The impact filter of claim 10, including;
first and second baffles associated with said impact plate on opposite sides of said nozzle for guiding air flow away from said impact plate, said baffles and said impact plates defining spaces therebetween; and first and second troughs disposed outwardly of said first and second baffles, respectively, relative to said nozzle, said troughs each having a trough bottom a greater distance from said impact plate than said spaces between said impact plate and said baffles.
15. The impact filter of claim 10, including:
an entrance panel defining said entrance nozzle, said nozzle being elongated and having an elongated nozzle outlet; and an exit panel associated with said entrance panel and defining an elongated exit orifice.
16. The impact filter of claim 15, said entrance panel and said exit panel overlying each other and having an entrance side and an exit side, said nozzle extending from said entrance side toward said impact plate substantially at said exit side, and said trough bottom being closer to said entrance side than said nozzle outlet is to said entrance side.
17. The impact filter of claim 15, said entrance panel defining a plurality of entrance nozzles, said exit panel defining a plurality of elongated exit orifices, and an impact plate and two said troughs associated with each said entrance nozzle.
18. The impact filter of claim 15, said exit orifices defined between adjacent said troughs associated with different said impact plates.
19. The impact filter of claim 10, including a plurality of filter modules disposed in series, interleaved relation; each said filter module having a said trough; and adjacent said filter modules disposed in spaced relation to define a said entrance nozzle and an exit orifice therebetween.
20. The impact filter of claim 10, further comprising:
said nozzle having a nozzle inlet and a nozzle outlet;
said impact plate extending laterally beyond said nozzle outlet;
and said trough including:
a first trough side contiguous with and extending away from said impact plate;
said trough bottom contiguous with and extending from said first trough side toward said nozzle;
said baffle disposed between said first trough side and said nozzle and being contiguous with and extending from said trough bottom toward said impact plate; and a trough inlet defined between said baffle and said impact plate.
21. The impact filter of claim 10, including a wash orifice near an end of said trough for admitting cleaning fluid into said filter.
22. The impact filter of claim 10, further comprising:
a first panel defining a plurality of entrance nozzles;
a second panel defining an impact surface, a contaminant trap and a plurality of outlet orifices; and a hinge connecting said first panel and said second panel allowing said panels to be swung open away from one another and to be closed overlying one another in spaced interdigitation.
23. The impact filter of claim 10, further comprising:
an entrance side and exit side;
said entrance nozzle having an inlet on said entrance side and a nozzle outlet confronted by said impact plate; and an exit orifice outwardly of said trough relative to said nozzle, said exit orifice having an opening in said exit side, said opening defining an area greater than an area defined by said nozzle outlet.
24. A process to clean an air stream having particles of different sizes therein, said process comprising:
first removing a substantial portion of larger particles from the air stream by passing the air stream through an impact filter; and thereafter removing a substantial portion of the smaller particles from the air stream by at least one of passing the air stream and the remaining particles from the impact filter through an electrostatic precipitator, passing the air stream and the remaining particles from the impact filter past a source of UV
light, and passing the air stream and the remaining particles from the first mentioned impact filter through a second impact filter.
25. An air filtering process for removing grease and other cooking exhaust particles from an air stream having a first set of the cooking exhaust particles each having a mass of at least a specified mass, and a second set of the cooking exhaust particles each having a mass below the specified mass, individual particles of the first and second sets of particles being randomly dispersed in the air stream; said process comprising:
accelerating the air stream with the first and second sets of cooking exhaust particles entrained therein;
directing the accelerated air stream with the first and second sets of particles entrained therein toward a surface and thereby diverting the first and second sets of particles relative to the surface and grouping the particles in separate current streams relative to the surface, with a first current stream nearest the surface including a substantial portion of the first set of particles and relatively few of the second set of particles, and a second current stream more distant from the surface including relatively few of the first set of particles and a substantial portion of the second set of particles; and separating the currents by directing a substantial portion of the first current into a trough having a bottom and a portion of the trough extending from the bottom toward the surface between the first and second currents.
CA2665484A 2006-11-10 2007-11-09 Impact filter with grease trap Active CA2665484C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US85796106P 2006-11-10 2006-11-10
US60/857,961 2006-11-10
US11/936,935 2007-11-08
US11/936,935 US7947123B2 (en) 2006-11-10 2007-11-08 Impact filter with grease trap
PCT/US2007/084275 WO2008061012A1 (en) 2006-11-10 2007-11-09 Impact filter with grease trap

Publications (2)

Publication Number Publication Date
CA2665484A1 true CA2665484A1 (en) 2008-05-22
CA2665484C CA2665484C (en) 2012-01-24

Family

ID=39367941

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2665484A Active CA2665484C (en) 2006-11-10 2007-11-09 Impact filter with grease trap

Country Status (9)

Country Link
US (2) US7947123B2 (en)
EP (1) EP2099546B1 (en)
JP (1) JP2010509564A (en)
CN (1) CN101528322B (en)
AT (1) ATE543557T1 (en)
AU (1) AU2007319352B2 (en)
CA (1) CA2665484C (en)
PL (1) PL2099546T3 (en)
WO (1) WO2008061012A1 (en)

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US8157894B2 (en) 2012-04-17
PL2099546T3 (en) 2012-07-31
US20110214565A1 (en) 2011-09-08
CA2665484C (en) 2012-01-24
JP2010509564A (en) 2010-03-25
US7947123B2 (en) 2011-05-24
AU2007319352B2 (en) 2011-03-31
ATE543557T1 (en) 2012-02-15
AU2007319352A1 (en) 2008-05-22
WO2008061012A1 (en) 2008-05-22
EP2099546A1 (en) 2009-09-16
US20080110339A1 (en) 2008-05-15
CN101528322A (en) 2009-09-09
CN101528322B (en) 2012-02-01
EP2099546B1 (en) 2012-02-01

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